DAC38J84: DAC38J84 PLL.

HENRY JUNG

Expert 2030 points

Part Number: DAC38J84
Other Parts Discussed in Thread: DAC39J84,

DEARS.

I have a question about DAC38J84 PLL.

Is the performance of the DAC38J84 2.5GSPS but 2.516GSPS possible?

Our condition is as follows, and the PLL is unlocked.

Fs=314.5728Mhz
DACCLK = 2516.5824Mhz
Interpolation = 8
PLL_VCO = 40
VCO_SEL = 0
VCO_TUNE = 3

Please Review.

Thank you.

over 4 years ago

0 dBrock over 4 years ago

TI__Genius 12780 points

Hi Henry,

We are taking a closer look into your question, and will be back with you soon.

Best Regards,

Dan

0 jim s over 4 years ago

TI__Guru* 91947 points

Henry,

I got this to work on a DAC38J84EVM but it will not be guaranteed as this exceeds the DAC data rate per the data sheet. This is within limits of the DAC39J84 though. Above you mention PLL_VCO = 40 and VCO_SEL = 3. What are these? They do not match up with any GUI parameters.

Regards,

Jim

DAC38J84_DAC_PLL_2.516GHz_LMF_841.pptx

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DAC38J84: DAC38J84 PLL.